Is there a limit on number of RBLs

Is there a restriction on the number of RBL's you can setup? Every time I run this shell script,
I only get abuseat.org and spamcop.net as RBLs in the postfix main.cf file. I really need the other ones.

As discussed in http://www.zimbra.com/forums/adminis...estricted.html there actually IS a restriction on the RBL lists you can use. You need to edit /opt/zimbra/conf/postfix_recipient_restrictions.cf and add all lists that you want to use and then reapply your configuration. It should now add the lists that you want.